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Method and system for multicast switching

A technology of multicasting and multicasting members, applied in the field of multicast switching methods and systems, and can solve the problem of no multicasting, etc.

Active Publication Date: 2013-01-30
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the process of multicast transmission in the PON system, when the main and standby OLT equipment in the PON system is switched, there is currently no multicast switching method in the prior art

Method used

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  • Method and system for multicast switching
  • Method and system for multicast switching
  • Method and system for multicast switching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] see figure 2 , is a schematic structural diagram of a PON network supporting multicast handover provided in this embodiment. Wherein, a broadband network gateway (BNG, Broadband Network Gateway) is an IP edge node, and the IP edge node may also be a broadband access server (BRAS, Broadband Remote Access Server). This embodiment uses BNG for illustration. figure 2 Among them, ONT is an optical network terminal (it can also be an ONU here), figure 2 In (a), EB is an extender, which may include an optical splitter and an OA; figure 2 The schematic diagram of the PON network structure shown in (b) includes an optical splitter. In this embodiment, the first OLT (primary OLT before OLT switching) and the second OLT (standby OLT before OLT switching) correspond to different BNGs respectively, that is, the first OLT corresponds to the first BNG, and the second OLT corresponds to the second BNG. In this embodiment, the multicast control message includes: Internet Group M...

Embodiment 2

[0083] see Image 6 , is a schematic structural diagram of a PON network supporting multicast handover provided in this embodiment. Image 6 Among them, ONT is an optical network terminal (it can also be an ONU here), Image 6 In (a), EB is an extender, which can include an optical splitter and OA, or can be separated from the optical splitter; Image 6 The schematic diagram of the PON network structure shown in (b) includes an optical splitter; the BNG is an IP edge node, and the IP edge node may also be a BRAS. This embodiment uses the BNG for illustration. In this embodiment, a physical connection is established between the first OLT and the second OLT, for example, using an optical fiber to directly connect the first OLT to the second OLT. During the multicast switching process, multicast membership information and / or The migration of the multicast ACL from the first OLT to the second OLT completes the multicast switching.

[0084] based on the following Figure 7 The ...

Embodiment 3

[0108] see Figure 8 , is a schematic structural diagram of a PON network supporting multicast handover provided in this embodiment. Wherein, the BNG is an IP edge node, and the IP edge node may also be a BRAS, and the BNG is used for description in this embodiment. In this embodiment, a logical connection is established between the first OLT and the second OLT, for example, the connection between the first OLT and the second OLT is established through EB, and during the multicast switching process, multicast membership information and / or The migration of the multicast ACL from the first OLT to the second OLT completes the multicast switching.

[0109] join Figure 9 , is a flow chart of the multicast switching method provided in this embodiment. In the multicast switching method provided by this embodiment, 301-306 are the same as 201-206 in Embodiment 2, and 308-310 are the same as 208-210 in Embodiment 2, and will not be repeated here; this embodiment and implementation ...

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Abstract

A method and a system for multicast switch are provided; the method is used in point-to-multipoint optical access system, before the master-standby switch is triggered, the first optical line terminal (OLT) and the second OLT respectively acts as the working OLT and the standby OLT, and the second OLT receives one branch of the multicast control message transmitted from the optical network terminal (ONT) and establishes the binding relationship between the multicast group address and the first port, wherein, the other branch of the multicast control message is sent to the first OLT, the first port is the port between the second OLT and the optical network terminal (ONT); during the master-standby switch, the second OLT receives the multicast member relationship and / or multicast right control table transmitted from the first OLT, and amends the multicast member relationship and / or multicast right control table based on the binding relationship between the multicast group address and the first port; after the master-standby switch is accomplished and the second OLT transfers from the standby state to the working state, the second OLT receives the multicast data massage transmitted from the IP edge node, and transmits the multicast data message transmitted from the IP edge node to the ONT based on the amended multicast member relationship and / or multicast right control table. The invention realizes the multicast switch in the meanwhile the master and standby OLT device in the PON system are switched during the multicast are transmitted in the PON system.

Description

technical field [0001] The invention relates to the communication field, in particular to a multicast switching method and system. Background technique [0002] Passive Optical Network (PON, Passive Optical Network) technology is a point-to-multipoint optical access technology, such as figure 1 As shown in (a), it consists of optical line termination (OLT, Optical Line Termination), optical splitter (Optical splitter), optical network unit (ONU, Optical Network Unit) and optical fibers connecting these devices. Among them, the OLT, as the central office equipment, is connected to the optical splitter through a backbone optical fiber, and the optical splitter is connected to each ONU through a separate branch optical fiber. The transmission of optical signals includes two directions: in the downlink direction, the optical splitter implements the optical splitting function, and sends the downlink optical signal of the OLT to all ONUs through the branch fiber; in the uplink di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q11/00H04L12/18H04L1/22
CPCH04L49/00H04L49/201
Inventor 郑若滨
Owner HUAWEI TECH CO LTD